The Accretion flow in M87 is really MAD
arXiv:2201.00512 · doi:10.3847/1538-4357/ac4714
Abstract
The supermassive black holes in most galaxies in the universe are powered by hot accretion flows. Both theoretical analysis and numerical simulations have indicated that, depending on the degree of magnetization, black hole hot accretion flow is divided into two modes, namely SANE (standard and normal evolution) and MAD (magnetically arrested disk). It has been an important question which mode the hot accretion flows in individual sources should belong to in reality, SANE or MAD. This issue has been investigated in some previous works but they all suffer from various uncertainties. By using the measured rotation measure values in the prototype low-luminosity active galactic nuclei in {M87} at 2, 5, and 8 GHz along the jet at various distances from the black hole, combined with three dimensional general relativity magnetohydrodynamical numerical simulations of SANE and MAD, we show in this paper that the predicted rotation measure values by MAD are well consistent with observations, while the SANE model overestimates the rotation measure by over two orders of magnitude thus is ruled out.
9 pages, 5 figures; accepted by ApJ
References in corpus (13)
- First M87 Event Horizon Telescope Results. I. The Shadow of the Supermassive Black Hole
- First M87 Event Horizon Telescope Results. V. Physical Origin of the Asymmetric Ring
- Simulating galaxy formation with black hole driven thermal and kinetic feedback
- The power of relativistic jets is larger than the luminosity of their accretion disks
- Numerical Simulation of Hot Accretion Flows (III): Revisiting wind properties using trajectory approach
- Magnetically Arrested Disks and Origin of Poynting Jets: Numerical Study
- Faraday rotation in the jet of M87 inside the Bondi radius: indication of winds from hot accretion flows confining the relativistic jet
- State-of-the-art energetic and morphological modelling of the launching site of the M87 jet
- Decomposing the Internal Faraday Rotation of Black Hole Accretion Flows
- Linear polarization in the nucleus of M87 at 7 mm and 1.3 cm
- Radiative Properties of Magnetically-Arrested Disks
- Large-scale dynamics of winds originated from black hole accretion flows: (II) Magnetohydrodynamics
- Large-scale dynamics of winds originated from black hole accretion flows: (I) Hydrodynamics